Multitubular steam-boiler.



Patented Feb. 25', |902.

F. D. ALTHAUSE.

MULTITUBULAR STEAM BOILER.

(Application led Oct. 11, 1901.)

3 Sheets-Sheet I.

(No Model.)

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Patented Feb. 25, |902.

F. n. ALTHAUSE. MULTITUBULAR STEAM BOILER.

(Application led Oct. 11, 1901.)

3 Sheets-Sheet 2.

(No Model.)l

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No. 694,048. Patented'feb. 25, |902.I

` F. n. ALTHAusE.

v MULTITUBULAR STEAM BUILER.

` (Applicatiqn filed Oct. l1, 1901.) (No Model.) l 3 Sheets-Sheet 3.

ooooooQoooooooofO-ooo .UNITED STATES PATENT OFFICE.

FREDERICK DANIEL ALTIIAUSE, OE NEW YORK, N. Y.

MULTITUBULAR STEAM-BOILER.

SEECIFICATION forming part of Letters Patent No. 694,048, dated February25, 190,2.

Application filed October ll, 1901. Serial No. 78,298. (No model.)

To all whom iz'; 177/601./ concern:

Be it known that LFREDERICK DANIEL ALT HAUSE, a citizen of the UnitedStates, and a resident of the borough of Bronx, in the city and State ofNew York, have invented a new and useful Improvement in-lll/lultitubular Steam-Boilers,of which the following is aspeciication.

This invention relatesto multitubular boilers of the water-tube kind,and especially to such boilers made -in separable sections; yand itconsists in certain details of construction and certain combinationshereinafter described and claimed whereby I obtain aboiler of greatsteam-generating capacity in proportion to its size and weight which iseasily cleaned, repaired, and kept in order and easily set up and ofwhich the sections are conveniently transportable. I

Figure l represents a vertical section transverse to its tubes of asectional water-tube boilerembodying my invention; Fig. 2, a verticalsection of the same parallel with the tubes; Fig. 3, an elevation of oneof the hollow slabs or boxes of which,with the tubes and steam-drum, theboiler is composed, the outer portion being omitted to show itsinterior; Fig. 3*, a horizontal section of a complete slab or box; Fig.4t, aview corresponding with Fig. 3, showing the connection andcommunication between two of said slabs on one side of the boiler; Fig.a horizontal section of the rear part of the boiler; Figs. 6 and 7,respectively a front and a rear view illustrating the tube connections.

A A designate upright hollow slabs or, kas they will be hereinaftertermed, boxes, of which the sides of the boiler are composed.

B, B, and Bk are tubes arranged transversely' to said boxes andconnecting every two opposite ones and forming such communicationsbetween them that two boxes and their con-v necting-tubes constitute onesection of the boiler. v v

C is a steam-drum, with which the upper parts of the several boxes areconnected by` pipes D D. The several sections, of which there may be anynumber, constituted as above mentioned and forming both water and steam`spaces are erected closed together, as shown. in Fig. l, on anysuitable settingsuch, for example, as the cast-iron base E represented.To complete the boiler thus composed of sections,iwalls F and G areerected in front and rear of the series of sections. A roof I orcrown-plate with a chimney I is placed over the said sections and endwalls, and a grate His providedin the lower part of the space betweensaid sections and rear walls, a fire-door .I above the grate and ash-pitdoor K belowthe grate being provided in the front wall F. The walls Fand G may be of any suitable material or construction. They arevrepresented as composed of double platesg 7L, spaced by intermediateframes t' and having their spaces illed with asbestos j, and they areshown as bolted to the end boxes A by bolts k.

No tubes are provided between the lower parts ot' the boxes A A overlthe grate H except those B at the back of the rear section, theomission of the tubes leaving sutticient space over the grate to form adre-chamber ot' suitable capacity and the tubes Bf occupying or formingthe rear portion ofthe tirechamber. Thetubes B B of alternate rows havea slant in opposite directions for the purpose of providing for anactive u-pward circulation of water and steam between the opposite boxesA of each section. The circulation-tubes B* below the grate arerepresented as without slant. The vboxes of the two end sections arebraced together laterally by brace-rods L, screw-threaded at their endsand fitted with nuts d d.

The construction of the boxes A A for obtaining easy access to thetubes, which is an screwed into tapped holes at in said flange.

The plates @a2 are stayed together by headed stay-bolts d5, screwed intotapped holes of in bosses a6, which are formed on the inner face of theplate a integral therewith and project therefrom nearly flush with theflanges a', so that the said plate a2 fits so close to both said flangesand bosses as just to leave room between them fora suitable packing, asasbestos. The stay-bolts thus applied and IOO not projecting through theinner plates a of the boxes A are unexposed both to fire and to waterand thus not liable to corrosion, and if injured in any way they can bereplaced from outside the boiler without removing anything else.

To provide communication between the abutting boxes of two adjacentsections, matching apertures b are provided, as shown particularly inFig. 4, so that water and steam may circulate freely between thesections. The adjacent boxes are bolted together by screw-bolts c, whichpass through their flanges a', tight joints being made between thecontiguous flanges by any suitable packing. These bolts c have tobeinserted before the plates d2 are put in place, but are accessible atany time by removing said plates.

The grate H has its length formed, as shown in Fig. l, of short bars oflengths correspending with the several boiler-sections, the said barsforeach section being supported on two transverse bearers e, which restin projectionsf, provided on theinner faces of the boxes A, eachboiler-section having its own grate or grate-section and being thuscomplete in itself, so that a boiler may be made up of any suitablenumber of such sections properly connected,and its capacity may be atany time increased, if necessary, by the addition of another section. Inthe boiler thus constructed while the tubes are to a very' considerableextent exposed to the radiant heat of the incandescent fuel in thetire-chamber and the heated gaseous products of combustion circulatebetween them on their way to the chimney I the Water and steam are inactive circulation to and fro through the tubes between the oppositeboxes of each section and between the adjacent boxes of the severalsections, and hence by reason of this active circulation and theextensive heating-surface aorded by the tubes being made of smallcaliber and very numerous a boiler of great steam-producing capacity andpower may be made of comparatively very light weight and if divided intoa suitable number of sections may be very portable.

In the construction of the boiler it is obvious that the tubes B B mustbe inserted into the plates or tube-sheets at before the plates d2 areapplied to the latter. The ends of the tubes are, as shown in Fig. 7,received in outwardly-tapered holes in said plate ct and may first beexpanded therein in the usual way to some extent byany suitableexpander; but they are further expanded and tightened therein byscrewing into each expanded end a taper externally-sereW-threadedbushing I., which is of a length somewhat greater than the thickness ofthe plate, and therefore so made to project beyond the faces of theplate as to rein force the tube. The screw-threaded bushing being madeof steel of a quality harder than the tubes may cut its ownscrewthreaded way into the tube. The said bushings may be easily removedby unscrewing them for the repair of the tubes. To permit this it is ofcourse necessary to take off the plate a2 from the box. On the removalof these plates a2 of two opposite boxes A all the tubes of that box maybe examined and easily cleaned. p

What I claim as my invention is l. A section of a water-tube boilerconsisting of two opposite upright boxes and communicatingtransversely-arranged tubes, the said boxes being each composed of aninner plate constituting a tube-sheet and an outer plate separable fromsaid inner plate for access to the tubes, substantially as hereindcscribed.

2. The combination with the inner and outer plates of a water-box for aboiler, of bosses which are formed upon the inner plate integraltherewith and stay-bolts passing through the outer plate from itsexterior and screwed into said bosses, su" bstantiall y as hereindescribed. n 3. The combination in a water-tube boiler of two or morewater-boxes abutting together and each composed of a flanged inner plateconstituting a tube-sheet and an outer plate detachably secured to thetlange of said inner plate, and bolts securing said boxes togetherthrough the flanges of their inner plates, the said flanges having inthem openings for communication between the abutting boxes,substantially as herein described.

4. The combination in a water-tube boiler composed of two or moresections each consisting of two opposite boxes and transverseconnecting-tubes, of a tire-grate madein sections one for eachboiler-section, and means for supporting said grate-sectionsindependently each on its own boiler-section, substantially as hereindescribed.

5. The combination with the tube-sheet of a boiler having a taper holefor the reception of a tube, of a tube inserted within said hole and ataper externally-threaded expandingbushing screwed into said tube withinthe tube-sheet, substantially as herein described.

In testimonyV that I claim the foregoing ast my invention I have signedmy name, in presence of two witnesses, this 9th day of October, 190i.

FREDE RICK DANIEL ALTIIAUSE.

Vitnesses:

FREDK. HAYNES, GEORGE BARRY, J r.

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